Variable-speed driving mechanism.



A, GOTOLI. VARIABLE SPEED DRIVING MECHANISM.

' APPLIGATION FILED s112118, 1911.

1,038,991.- 1 Patented Ju1y'3o,1912.

2 SHEETS-sum1..

. A. GoToLI. VARIABLE SPEED DRIVINGy MEGHANISM.

APPLICATION FILED SEPT. 18, 1911.

vPatented. July 30, 1912.

2 SHBBTPSHEEQL. 2.

' INI/ENT@ Mmmm Emmi.

L'NTONIO COTOLI, OF HABANA, CUBA.

VARABLESPEED DRIVING MECHANISM.

Application filed September 18, 1911.

To ll/ fui/mm rf may confiera.'

lle it known that l, ANTONIO CoToLi, a subject of the 'King of Spain,residing at lriuralla No. 111, (datos, Habana, Cuba, have inventedcertain new and useful improvements in Variahle- Spoed 'D riyingMechanism of which the following,r is aspecification.

This invention relates to new and useful improvements in variable speeddriving mechanism, and the object thereof is to provide means, in amanner as hereinafter set forth whereby the driven shaft receives motioncapable of successive and extensive graduation in variation of speedrelatively to a driving shaft.

Another obK ect of my invention is to provide the driving shaft withmeans, in a manner as hereinafter set forth, for readily coupling saidshaftto and unooupling it from the driven shaft, said means constitutinga clutching means. l

1n 4the accompanying drawings: Figure 1 is a perspective view of adriving mechanism in accordance with this invention. Fig. 2 is alongitudinal section of said meehanism in clutching position. Fig. 3 isa similar section to Fig. 2, showing said mechanism in an unclutchingposition. Fig. f1 is a front view of the frame supporting the frictionWheels" forming part of said mechanisin. Fig. 5 is a detail showing aside view of one of the friction Wheels with its bearing frame. Fig. 6is a perspective view of one of the friction disks of the drivingmechanism. Fig. 7 is a cross'seetional vieiv of the mechanism. takenonthe plane of the line 7-7 of Fig. 3. Fig. 8 is a cross-sectional vieWof said mechanism taken on the line S--S of Fig. 3. Fig. t) is across-sec tional view similar to Fig. S, showing' one of the clampingholtsfof the clutching means, in a changed position.

The mechanism comprises a friction disk 1 having an annular recess 1,and a central body 3 provided with a central opening 4, said centralbody being extended to form a sleeve 5, which constitutes a hearing forthe end of the driven shaft il, by means of an interposed sleeve 7. Thedisk and the sleeve 7 are ViXed to the driven shaft (5 oy means of ascrew S.. The sleeve 5 also constitutes a 'seat for an end flange 9 ot'the driving shaft l() which mounted in the central opening 4, and thesaid flange l) .rests against the central body 23 and engagesSpecification of Letters Patent.

Patented July 30, 1912.

Serial No. 649,779.

halls 11 in order nto avoid friction between the disk 1 and the drivingshaft 10. 0n this shaft 10 there isislidably keyed a friction disk 1Q ofthe saine form and exact diameter as friction disk 1s with the onlydifference that its central openingtits closely throughout its length onthe shaft 10 and the said disk 12 is placed in a reversed positionrelatively to disk 1, so that its annular recess '14. remains in frontof the annular recess 2 of disk 1 and spaced away from the saine.

Between disk 1 and disk 12 there is arranged a series of'friction Wheels15 which are adapted to transmit the rotary movement of disk 12 to disk1 by frietional engagement Wit-h both disks. In the drawings, a seriesof four friction wheels 15 are shown, each .of ivhichvis formed 1oy aplurality of leather disks 1li fastened hy means of four screws 20, andnuts 21 between tivo metallic disks 17, 1S, one of which 18 has acentral sleeve 19 crossing disk 17 and disks 1G, and the sleeve 19receives a shaft 22 which is rigidly mounted across the sides of` arectangular hearing frame 23. The said shaft '22 is provided With a head2-1 at one end, a nut which screws up at the other end of said shaft 22,being provided to hold it in position in the said /frame 23. The upperand lower portions of each hearing frame 28 are provided each withjournais 2G, 27 respectively, and in these `iournals are keyed beveledwheels Qt?, 25) respei tively, the journals being in alinement with eachother, in order to form a revolving shaft for ach hearing frame 23. Thefour frames lil are reetangularly grouped so that'each hrveled Wheel 2Smeshes ivith a Wheel if) of the next frame and each beveled wheel 20ofthe same frame may mesh with the beveled ivhecl 28 ofthe followingfraiixe, and the Iiournals .2G and 27 are mounted, in projectiims 30 inthe supporting frame 31 and the other two opposite pairs in tivoangular-shaped plates 32, to the frame 31. This: trame 31 has tivoflanges 323, each one with a hole 34 by means of ivhich the said frameis held in a [ixed position between the two disks 1 and 12, so that theinner surface of the frame 31 engages with the slightly beveled edge 35of disks 1 and lil. The friction wheels 15 are, equal in diameter to thecross section ol' the annular recess or 11i in order that in the normalposition of disk .12 there may `1 loe a frictional enf gagementof allthewheels 15 with the inner face of said annular recesses 2 and 14,irrespective of the position of said wheels relatively to the' disks 1and 12. This'v 1nclination of the wheels 15 is changed by means of oneof the journals 27 by a handle 36. "When the handle 36 is turned, theframes v23 revolvethrough the action of the beveled gears 28, n9andtherefore the inclination of the wheels 15 is changed.

The vseries of friction wheels 15 is prol vided with lubricating meanswhich. comprises a T-shaped pipe 37'in threaded en- ,gagement Wit-h theshaft 22 of each wheel at' one end thereof, and through said pipe alubricant comes into a hollow 38 in said shaft which has its out-letlopening at one side .of this shaft. Said tubes 37 are ljoined togetherexcepting two of them, lby three flexible india rubber ,pipes 39passing` through clasps 4() fixed on one side .of each frame 23, one ofthe pipes'37 `beingfclosed at one end and the other pipe 37 being con?nected by means oft' an india rubber pipe 41 with the bottom of areceptacle 12, containing a lubricant, and which is secured on the upperportion of fra1ne31.

The clutching means is constructed in the following manner: @ver arecess ot' central body 13 there is disposcd'a sleevefitl, mounted ontire driving shattvlO and fixed longitudinally relatively to thefriction disk y12 but free to revolve on the same by means of two screws44 which go 'through the sleeve 43 in opposite direct-ions and the innerends of which rest loosely in an annular groove 45. The said sleeve 43is provided at its end opposite 13 with a reduced cylindrical portion 46of great-er internal diameter than the sleeve 43 and which constitutes anut having threaded engagement with a screw formed by the recessedportion ot' another sleeve 47, mounted on the drivingv shaft 10 andfixed longitudinally by means of two screws 43 extending through saidsleeve 47 vand the interior ends of which rest loosely in an annulargroove 49, of a third sleeve 50, fixed/on the driving shaft 10, by meansof a screw l. Over the end portion of nut 46 there is mounted inthreaded engagement a collar 52 and over the remaining portion of samenut .46 there is slidably mounted another collar 53, provided with twojournals 54, at the ends of the horizontal diameter, said'jo-urnalsentering loosel into openings formed at the end of a bi urcation whichconstitutes the lower end of a lever 56, pivoted at a fixed point 57.The lever 56 is articulated to a horizontal bar'58 provided wit-h ahandle 59 and subjected to the i action of a spring 60 and has one endfixed to this and the other end rests on a cross piece 61, through whichpasses the bar 58, and which is fixed to the frame. The collar 65 53hasn lug 62 provided with a small bar ,64, and ylever 65. projects outof the sleeve and in its nor- 63 parallel to shaft 10 and each one ofthe sleeves 43 and 47 is provided with a clamping bolt 64 mounted at theinner end of an angular lever 65, pivot-ed into one ofthe faces of arecess 66, formed in each sleeve, and said recess 66 incloses theclamping bolt The outer end of this leverA mal position the clampingbolts G4 are engaged in longitudinal grooves 67 68, formed in theperipheryof the shaft l0 by means o1 the action of a spring 69. Thesmall bar 63 is of a length somewhat less than the dis tance between thetwo levers 65 of sleeves 43 and 47, when these sleeves are in clutchingposition. v

The operation of the described mechanism is as follows: When the drivingshaft 10 revolves, the disk 12 is revolved and wheels 15 are adapted tolrictionally engage with 'the inner face of the annular recesses 2 and14, since the said wheels 15 are in a certain inclined positionrelatively to the disks 1 and 12 (Figs. 2 and 3). Movement of the disk12 imparted to the disk 1 through the intermcdiacy of the wheels v15,which revolve responsive to their frictional engagement with disk 12 andimpart movement to disk l through their frictional engagementtherewith,the two disks revolving in counter directions. ln view of the foregoing,and upon inspection of Fig. 2, it will be yseen `that, with the planesof rotation of the wheels .15 inclined with respect'to the axis ot' thedrive sha't't l() and diverging from the planes oi rotation of disk l2toward the plane of rotation of disk 1, a reduction of speed occursbetween disk v12 and disk 1. The speed of disk'l may be graduallyincreased from a diminishing speed to an equal speed o1 rotation betweenthe disks, when the plane of rotationy of each -wheel 15 is parallel tothe axis of drive shaft 10. As soon as the planes of rotation of thewheels 15 become' inclined with respect to the axis of shaft 10 andconverge toward each other from disk 12 to disk 1, then the disk 1rotates faster than disk 12. These variations of speed take placethrough the change oit frictional Contact of the wheels with the disksurfaceswvth respect to the axis et' rotation of a driving and drivenelement. Y K

When the plane of rotation of all of the wheels 151s parallel to theplane of rotation of eachl disk 12 andl 1, then no motion is transmittedfrom onerto the other and *i itis obvious that the Awheels 1r5-"n1ay berendered inactive as emotion transmitting means directly after thegreatest increase of speed from disk 12 to disk lfhas been obtained,by-merely rotatinglthe frames of wheels 15' to bring their planes ofrotation in parallel relation toVA each other. In' order to render the.wheels `inactive tion of parts being such as illustrated in ilig. 2 ofthe drawing, by actuating the bar 5S against action of spring 60, thelever 56 is swung on its pivot and collar moved in an axial directiontoward disk l2. inasmuch as the sleeve 43 normally rotates with theshaft 10, through clamping bolts 64, the actuating lever of such boltwill ultimately contact with bar G3 and be actuated to withdraw bolt 64,and retard movemento of Vthe sleeve 43. Immediately thereafter thethreaded portion of sleeve 47, which is retained against axial movementand rotated with shaft 10 through its clampingbolt G4, acts upon theinternal threaded portions of the sleeve 43 and draws the said sleeve inan axial direction towa 'd the .sleeve 47. The movement of sleeve t3 asdescribed, withdraws disk 12 from frictional contact with wheels 15 andhence they are rendered inactive as motion transmitting means betweenthe disks. The disk 12, however, continues to rotate with shaft 1G,while the sleeve 43, carrying with it the collar 53, presents the rod 63in the path of movement of the actuating members of the bolt(illassociated with sleeve et?. `When this member 35 contacts with rod(33 the bolt (3l-'l withdrawn and the collars 43 and i7 come to rest,the shaft 1() continuing to rotate. 'The relative position of partsultimately assumed, responsive to actuation through rod as described, isshown in Fig. 3 of the drawing, in which both clamping bolts (El areheid out of their grooves in the 5 shaft 1() by the rod 133.

Any suitable catch mechanism, not shown .in the drawing, may be'provided to retain the bar 58 in a position resisting movementresponsive to spring G0 when it is desired that the wheels l5 shall. nottransmit movement from one disk to the other. Then it is again desiredto render the wheel 15 active as motion transmitting means between thedisks 12 and l, the rod 58 is released and moves the lever 5t responsiveto spring action (it). This action moves collar 53 toward stationarycollar and consequently releases bar il?) from the member (3.5 allowingthe clamp holt ttl of sleeve t3 to 0 become active and hence motion ofshaft 10 transmittal to sleeve -i-l. 'i`hereupon, the

sleeve 41S moves axially away from sleeve lf through it threadedLmgagement therewith and causes disk 12 to be nloved toward 5 andultimately contacts with the wheel 15.

#also rotates with shaft 10 and consequently theaxial feed of sleeve 43stops when the disk is brought into contact with the peripheries of thewheel 75, with the relative position of parts as shown in Fig. of thedrawing.

What I claim is:

1. A variable speed mechanism .comprising in combination, driving anddriven shafts, disks fixed to said shafts and having' circular concavefriction faces, pairs of friction wheels engaging said faces and gearedto each other within said conca-ve faces, and means for swinging saidfriction wheels with their respective planes of rotation intersectingthe plane of rotation of either disk, or in parallel relation to theplane thereof in unison, substantially as described.

2. A variable speed mechanism comprising in r- Yibinat-ion, driving anddriven shafts, disks fixed to said shafts and having circular concavefriction faces, pairs of friction wheels engaging said faces,rectangular shafting geared to said wheels, disposed 4within said facesand adapted to revolve,

and means connected with said shafting for adjusting the position ofsaid wheels in unison, substantially as described.

3. A variable speednieehanism comprising in combination, driving anddriven shafts, disks fixed to said shafts and having circularconcavefriction faces, pairs of friction wheels engaging said faces,rectangular shafting geared to said wheels, disposed between said faces,and adapted to revolve a ring disposed outside of said faces forcarrying said wheels and shafting, and means mounted on said ring andconnected with said shafting to adjust said wheels in unison,substantially as described.

4t. A variable speed mechanism comprising in combination, a drivingshaft, a driven shaft, a friction disk slidably keyed to said drivingshaft, a driven friction disk for said driven shaft, friction wheelsinterposed between said disks, a nui. comiected with 'said driving disk,a second nut having threaded engagement -with said tirst mentioned nutand connected with said shaft, devices for locking said nut with saidshaft, manual means for actuating said devices, and a member carried byone of said nuts for automatic; lly actuatiiuij said means.substantially as described.

5. A variable speed mechanism comprising in combination, a driving'shaft, a driven shaft, a. friction disk slidably keyed to said drivingshaft, a driven friction disk-for said driven shaft, friction wheelsinterposed between said friction disks, a pair of members havingthreaded engagement. with sich other, one member being' coniu-icted withsaid driving disk and one member with said shaft and devices for lockingor unlocking said members With and from said shaft, substantially asdescribed.

6. A variable speed mechanism compris ing,- in combination, a drivingshaft, a driven shaft, a friction disk keyed to said driving shaft, adriven friction disk for said driven shaft, friction Wheels interposedbetween said disks, a pair of members having thread ed engagement witheach other, one member being rotatably connected With said driven diskand the other member being rotatably carried with the shaft and devicesfor locking either or both o'f said members to said shaft, substantiallyas described.

A variable speed mechanism comprising in combination, a driving and adriven disk, friction wheels interposed between messer said disks totransmit motion from one to the other, a driving shaft connected Withthe driving disk, a pair ont' members having threaded engagement Witheach other, one member being rotatably connected with the driving' diskand the other member being rotatably connected with the shaft, devicesfor locldngig either or both of said members to said shaft, andmechanism actuated upon movement of said members for adjusting saiddevices.

n testimony ivhereofl have hereunto set my hand in presence of twosubscribing Witncsses. ANTONI@ GGTOLI.

`Witnesses C. E. GUYAUT, N. Ascom.

